Question

a ball of 200 gm moving with 20m/s towards a wall, strikes the wall and returns with 10 m/s. find the net change in momentum.

Answer 1

Answer:

Explanation:

given,

mass,m=200gm=200/1000kg=0.2kg

Before collision

velocity= 20m/s

implies momentum p1=mv= 0.2*20=4kgm/s^(2)

After collision

velocity= 10m/s

implies momentum p2=mv= 0.2*10=2kgm/s^(2)

change in momentum= 2-4=-2kgm/s2 is the change in momentum

I hope this is the correct answer